<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>文档标题</title>
  <style>
    .container{
      display: grid;
      grid-template-rows: 50px 2px auto 2px 20px;

      height: 100vh;
      border: solid red;
    }

    .top {
      grid-column: 1;
      grid-row: 1;

      height: 50px;
      border: solid 1px green;
    }

    .center {
      grid-column: 1;
      grid-row: 3;

      height: 100%;
      border: solid 1px green;

      display: grid;
      grid-template-columns: 200px 5px auto;
    }

    .left {
      grid-column: 1;
      grid-row: 1;
      width: 200px;
      height: 100%;
      border: solid 1px blue;
    }

    .right {
      grid-column: 3;
      grid-row: 1;
      height: 100%;
      border: solid 1px blue;
    }

    .bottom {
      grid-column: 1;
      grid-row: 4;

      height: 20px;
      border: solid 1px green;
    }
  </style>
</head>
<body>
<h1>Grid</h1>

<div class="container">
  <div class="top">Top</div>
  <div class="center">
    <div class="left">Left</div>
    <div class="right">Right</div>
  </div>
  <div class="bottom">Bottom</div>
</div>

</body>
</html>
